Nut-lock.



J. M. WARD.

NUT LOCK. APPLICATION FILED 0CT.5, I914.

mmmo

Patented Nov. 30, 1915.

3140214 500- .WLQ/ A d in sites annrr' nae.

JARRETT M. WARD, OF JARRETTSVILLE, MARYLAND.

NUT-LOCK.

To all whom it may concern:

Be it known that I, JARRETT M. WARD, a citizen of the United States,residing at Jarrettsville, in the county of Harford and State ofMaryland, have invented certain new and useful Improvements in Nut-Locks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

, This invention relates to nut and bolt locks and one of the principalobjects of the invention is to provide a nut lock in which a nut may besecured at any desired point on the threaded portion of the bolt and maybe locked against movement in either direction, and which will permitthe nut to be readily removed or adjusted upon the threaded portion ofthe bolt.

Another object of the invention is, to provide a nut lock in which thenut is looked upon the bolt at any desired point by a key and in orderto prevent the key from displacement the bolt is made expansible and aplug is fitted to an interior screw threaded portion.

The foregoing and other objects may be attained by means of theconstruction illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of a bolt and nut lock made in accordancewith this invention, the threaded plugs being removed,

rality of longitudinal grooves 3 which may extend the full length of thethreaded portion. As shown there are four grooves in the bolt, but it.will be understood that any number may be utilized. The threaded endSpecification of Letters latent.

Application filed October 5,

Patented Nev.3, 1915.

1914. Serial no. 865,132.

of the bolt is partially separated into two sections by a slot 4, and atapering bore 5 is provided longitudinally of the bolt, said taperingbore being threaded oppositely to the threads 2 of the bolt. That is tosay, if

the threads 2 are right hand threads the threads in the bore 5 will beleft hand threads and vice versa. Fitted in the bore 5 is a threadedexpansive plug 6, said plug having a screw driver groove 7 in the outerend thereof and said plug being tapered to fit the bore 5. The nut 8 isprovided with longitudinal grooves 9 in the opposite sides thereof,there being four such grooves, and to hold the nut firmly on thethreaded portion 2 of the bolt at any desired point a key 10 isprovided. The key 10 is slightly tapered in form and is provided with asuitable bent end or head 11.

The operation of the invention may be briefly described as follows: Whenthe nut 8 is turned on the threaded portion of the bolt 1 to the desiredposition, the key 10 is inserted in one of the grooves 3 of the bolt andthe registering groove 9 of the nut. In this condition the key 10 mightreadily work loose but when the threaded plug 6 is turned into the bore5 on the bolt at the end the key i held firmly in place and cannotbecome detached or lost, and as a result the nut is held firmly in placewithout possibility of accidental displacement.

From the foregoing it will be obvious that a nut lock made in accordancewith this invention provides an expansible bolt and also a nut lock ofreliable construction.

Various changes may be made in the details of construction withoutdeparting from the spirit and scope of the invention as defined in theclaim.

What is claimed is A nut lock comprising a bolt provided with a head andshank, the upper portion of the shank being threaded, the shank having alongitudinal slit extending the entire threaded portion and longitudinalgrooves at right angles to the slit, said shank having an axiallyextending tapering threaded bore, a nut threaded on said bolt having aplurality of grooves extending through the nut for registering with thegrooves on the bolt, a key fitted in said registering grooves to keepthe said nut from rotating and 5 tapering threaded plug to expand saidbolt thereby keeping the key in.engagement With the Walls of saidregistering grooves.

JARRETT M. WARD.

Witnesses:

T. H. WARD, J. E. WARD.

